[{"type":"article-journal","title":"Observation of e$^{+}$e$^{-}$ -> \u03c0$^{+}$\u03c0$^{-}$\u03c0$^{0}$\u03c7$_{b1,2}$(1$\\textit{P}$) and search for e$^{+}$e$^{-}$ -> \u03d5\u03c7$_{b1,2}$(1$\\textit{P}$) at $\\sqrt{s}$ = 10.96$-$11.05 GeV","issued":{"date-parts":[["2018"]]},"volume":"98","issue":"9","page":"Art.-Nr.: 091102","container-title":"Physical review \/ D","DOI":"10.1103\/PhysRevD.98.091102","author":[{"family":"Belle Collaboration"},{"family":"Yin","given":"J.\u2009H."},{"family":"Yuan","given":"C.\u2009Z."},{"family":"Adachi","given":"I."},{"family":"Aihara","given":"H."},{"family":"Al 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Hulse","given":"C."},{"family":"Van Tonder","given":"R."},{"family":"Varner","given":"G."},{"family":"Vinokurova","given":"A."},{"family":"Vorobyev","given":"V."},{"family":"Wang","given":"B."},{"family":"Wang","given":"C.\u2009H."},{"family":"Wang","given":"M.-Z."},{"family":"Wang","given":"P."},{"family":"Wang","given":"X.\u2009L."},{"family":"Watanuki","given":"S."},{"family":"Widmann","given":"E."},{"family":"Won","given":"E."},{"family":"Yamamoto","given":"H."},{"family":"Ye","given":"H."},{"family":"Yusa","given":"Y."},{"family":"Zhang","given":"Z.\u2009P."},{"family":"Zhilich","given":"V."},{"family":"Zhukova","given":"V."},{"family":"Zhulanov","given":"V."}],"ISSN":"2470-0010, 2470-0029","abstract":"We report searches for the processes e$^{+}$e$^{-}$ \u2192 \u03c0$^{+}$\u03c0$^{-}$\u03c0$^{0}$\u03c7$_{bj}$ and e$^{+}$e$^{-}$ \u2192 \u03d5\u03c7$_{bj}$ (J=1, 2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process e$^{+}$e$^{-}$ \u2192 $^{+}$\u03c0$^{-}$\u03c0$^{0}$$_{non\u2212\u03c9\u03c7b1}$ and first evidence for e$^{+}$e$^{-}$ \u2192 \u03c9\u03c7bJ in the vicinity of the \u03a5(11020) resonance, with center-of-mass energies from 10.96 to 11.05 GeV. The significances for $^{+}$\u03c0$^{-}$\u03c0$^{0}$$_{non\u2212\u03c9\u03c7b1}$ and \u03c9\u03c7bJ are greater than 5.3\u03c3 and 4.0\u03c3, respectively. We also investigate the energy dependence of the e$^{+}$e$^{-}$ \u2192$^{+}$\u03c0$^{-}$\u03c0$^{0}$\u03c7bJ cross section, but we cannot determine whether the contributions are from the \u03a5(10860) and \u03a5(11020) resonances or nonresonant continuum processes. The signals for e$^{+}$e$^{-}$ \u2192 \u03d5$_{\u03c7bj}$ are not significant, and the upper limits of the Born cross sections at the 90% confidence level are 0.7 and 1.0 pb for e$^{+}$e$^{-} \u2192 \u03d5\u03c7b1 and \u03d5\u03c7b2, respectively, for center-of-mass energies from 10.96 to 11.05 GeV.","kit-publication-id":"1000089491"}]